| Patents Granted on 1931-02-03 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| DE-517,257 | Feb. 03, 1931 | n. listed | Machine for Grinding Balls Using Two Cylindrical Grinding or Guide Disks | grinding machines |
| 1,790,848 | Feb. 03, 1931 | A. Schinkez, E.R. Smith | Automatic Lathe and Blank Feeding Means Therefor | metal lathes |
| 1,790,892 | Feb. 03, 1931 | E.T. Adams | Internal Combustion Engine | oil engines |
| 1,790,912 | Feb. 03, 1931 | M.J. Goldberg | Pump Governor Control Means | internal combustion engine governors |
| 1,790,919 | Feb. 03, 1931 | W.C. Heath | Metallic Container | washing machines |
| 1,791,072 | Feb. 03, 1931 | R.E. Manley | Brake-band-drilling machine | brake maintenance |
| 1,791,073 | Feb. 03, 1931 | R.E. Manley | Drill support | handheld power tool accessories |
| 1,791,191 | Feb. 03, 1931 | J.E. Carlin | Shearing and Cutting Machine | metal shearing machines |
| 1,791,270 | Feb. 03, 1931 | W.F. Groene | Motor Traverse for Lathes | metalworking machine mechanisms |
| 1,791,442 | Feb. 03, 1931 | J.E. Caster | Grinding Machine | grinding machines |
| 1,791,443 | Feb. 03, 1931 | C.A. Bjornnson, C.P. Clark | Fuel Injection Mechanism and Method | cylinder heads |
